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A measure of the degree of association among a pair of variables.

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calculating correlation between binary vectors with generating with uniform distribution

I want to know, what is your opinion for calculating the correlation between binary vectors? … binary vectors X1 and X2 generating by a uniform distribution, as follows: X1=(1 0 0 1 1 1 0 ) X2=(1 0 1 1 1 0 1 ) Since they have the same bits in the exact 4 position of this 7 bits, can we say the correlation
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